Should I check for other causes before choosing Shrink?

I feel that my facial contours have become less defined than before, but I am not sure if this is due to sagging skin or another cause.

If you decide on a lifting procedure without knowing the exact cause, the actual results may differ from what you expected.

How are skin sagging, facial fat, and the original facial shape explained and distinguished during a Shurink consultation? I am curious about the key aspects checked during the diagnostic process.